Power Electronics

The course is a substitute for:

Power Electronics (E14VEL)
Power Electronics (X14VEL)

Lecturer:

Tutor:

Supervisor:

Department of Electric Drives and Traction

Synopsis:

Rectifiers in bridge- and zero point connections, four-quadrant rectifiers. Valves dimensioning, their series- and parallel connection. AC controllers. DC choppers. Voltage type inverters. Resonance inverters. Direct- and non-direct frequency converters. Power semiconductor compensators and active filters. For each converter, the type scheme, operation principle, time behaviour of voltages and currents, properties and application are translated.

Requirements:

Active participation on lab measurements (max.3 excused absences), elaboration of check test, presentation of own lab works

Syllabus of lectures:

1. Power electronic devices and their characteristics, types of electronic converters and their usage areas

2. Rectifiers: Classification, principle of phase control, inverter mode, single phase bridge connection

3. Rectifiers: Three phase bridge connection, triggered impulse generators

4. AC controller: Schemes and principle of phase control, performances for different load types

5. DC chopper: Schemes and control principles for an output voltage decreasing and increasing

6. Voltage type inverter: Principle of operation, single- and three- phase inverter, amplitude, width and PWM control

7. Single-phase resonance inverter: Operation principle, voltage and current type inverter properties

8. Power electronic compensator: Operation principle and controlled reactor and STATCOM properties

9. Parallel and series connection of devices, over voltage protection

10. Power and control circuits topology of AC semiconductor switches

11. Power and control circuits topology of DC semiconductor switches

12. Working regimes of semiconductor switches

13. Protection of semiconductor switches

14. Hybrid switches

Syllabus of tutorials:

Two lab exercises can be joined in a couple with four-hour duration

1. Introduction in lab, operation with an oscilloscope

2. Indication of power electronic devices, operation with catalogues

3. Measurement on single pulse rectifier - different load types

4. Measurement on a thyristor single phase controlled rectifier with different load types

5. Measurement on a thyristor three phase controlled rectifier with different load types

6. Measurement on reversible controlled rectifier - circular currents and their reduction

7. Check test, measurement on a single phase AC controller

8. Measurement on a DC chopper

9. Measurement on a single inverter

10. Measurement of a series and parallel connected valves

11. Measurement on AC semiconductor switch

12. Semiconductor switch controlling circuits assembly

13. Zero-switch measurement

14. Demonstration of over-current and over-voltage protection elements. Credit

Study Objective:

Study materials:

1. Leonhard, W.: Control of Electrical Drives Springer Verlag, 2001

2. Next literature will be specified by the lecturer

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Heavy-current Engineering- structured studies (compulsory course)